Regenerate gemspec for version 0.6.2
Regenerate gemspec for version 0.6.2

bogdan/datagrid,artofhuman/datagrid,reenhanced/datagrid,sadaf2605/datagrid,reenhanced/datagrid,11factory/datagrid,artofhuman/datagrid,jeanlinux/datagrid,bogdan/datagrid,jeanlinux/datagrid,sadaf2605/datagrid